Rose plant named &#39;Prerarust&#39;

ABSTRACT

A distinctive cultivar of Hybrid Tea Rose plant named ‘Prerarust’, characterized by its shiny dark green leaves; long, strong and green flowering stems; large salmon orange-colored flowers; and excellent postproduction longevity.

BOTANICAL CLASSIFICATION/CULTIVAR DESIGNATION

[0001]Rosa hybrida cultivar Prerarust

BACKGROUND OF THE INVENTION

[0002] The present invention relates to a new and distinct cultivar ofHybrid Tea Rose plant, botanically known as Rosa hybrida, andhereinafter referred to by the cultivar name Prerarust.

[0003] The new cultivar is a product of a planned breeding programconducted by the Inventor in Rijsenhout, The Netherlands. The objectiveof the breeding program was to develop new cut Rose cultivars withattractive flower colors, long and strong stems, dark green leaves, goodproduction during the winter, and good postproduction longevity.

[0004] The new cultivar originated from a cross made by the Inventor in1995 of two proprietary selections. The proprietary selection identifiedas code number 92-184, not patented, was the female, or seed, parent andthe proprietary selection identified as code number 92-308, notpatented, was the male, or pollen, parent. The cultivar Prerarust wasdiscovered and selected by the Inventor as a flowering plant within theprogeny of the stated cross in a controlled environment in Rijsenhout,The Netherlands.

[0005] Asexual reproduction of the new cultivar by cuttings taken atRijsenhout, The Netherlands, has shown that the unique features of thenew cultivar are stable and reproduced true to type in successivegenerations of asexual reproduction.

SUMMARY OF THE INVENTION

[0006] The following traits have been repeatedly observed and aredetermined to be the unique characteristics of ‘Prerarust’. Thesecharacteristics in combination distinguish the new Hybrid Tea Rose as anew and distinct cultivar:

[0007] 1. Shiny dark green leaves.

[0008] 2. Long, strong and green flowering stems.

[0009] 3. Large salmon orange-colored flowers.

[0010] 4. Excellent postproduction longevity.

[0011] Compared to plants of the female parent, the selection 92-184,plants of the new Hybrid Tea Rose have shorter flowering stems, are morefreely flowering, have longer postproduction longevity, are moreresistant to Powdery Mildew and differ in flower color as plants of theselection 92-184 have orange-colored flowers. Compared to plants of themale parent, the selection 92-308, plants of the new Hybrid Tea Rose aremore resistant to Powdery Mildew and differ in flower color as plants ofthe selection 92-308 have yellow-colored flowers.

[0012] Plants of the Hybrid Tea Rose can be compared to plants of thecultivar Pretaner, disclosed in U.S. Plant Pat. No. 11,272. Inside-by-side comparisons conducted by the Inventor in Rijsenhout, TheNetherlands, plants of the new Hybrid Tea Rose differed from plants ofthe cultivar Pretaner in the following characteristics:

[0013] 1. Plants of the new Hybrid Tea Rose were more freely floweringthan plants of the cultivar Pretaner.

[0014] 2. Plants of the new Hybrid Tea Rose and the cultivar Pretanerdiffered in flower color as plants of the cultivar Pretaner had yellowand white-colored flowers.

BRIEF DESCRIPTION OF PHOTOGRAPH

[0015] The accompanying colored photograph illustrates the new HybridTea Rose plant, showing the colors as true as it is reasonably possibleto obtain in colored reproductions of this type. Colors in thephotograph may differ slightly from the color values cited in thedetailed botanical description which more accurately describe the actualcolors of the new Hybrid Tea Rose. The photograph comprises a sideperspective view of typical flowers and leaves of the new Hybrid TeaRose grown in Rijsenhout, The Netherlands.

DETAILED BOTANICAL DESCRIPTION

[0016] Plants of the new Hybrid Tea Rose have not been observed underall possible environmental conditions. The phenotype may varysignificantly with variations in environment such as temperature andlight without, however, any variance in genotype.

[0017] The aforementioned photographs, following observations andmeasurements describe plants grown in Rijsenhout, The Netherlands, inglass-covered greenhouses with average day temperatures of 18° C. andaverage night temperatures of 17° C. Cut flowering stems used for thephotographs and the description were about seven weeks old. In thefollowing description, color references are made to The RoyalHorticultural Society Colour Chart except where general terms ofordinary dictionary significance are used.

[0018] Classification:

[0019]Botanical.—Rosa hybrida cultivar Prerarust.

[0020]Commercial.—Hybrid Tea Rose used as a cut flower.

[0021] Parentage:

[0022]Female, or seed, parent.—Proprietary selection of Rosa hybridaidentified as code number 92-184, not patented.

[0023]Male, or pollen, parent.—Proprietary selection of Rosa hybridaidentified as code number 92-308, not patented.

[0024] Propagation:

[0025]Type.—By vegetative cuttings.

[0026]Time to initiate roots.—About 12 days at 25° C.

[0027]Time to develop roots.—About 25 days at 25° C.

[0028]Root description.—Fine, fibrous and well-branched.

[0029] Plant description:

[0030]Form.—Upright; narrow; bushy.

[0031]Plant height.—About 100 cm.

[0032]Plant width.—About 40 cm.

[0033]Growth habit.—Moderately vigorous.

[0034]Flowering stems.—Quantity per plant: About 3 or 4 per plant.Length: About 85 cm. Diameter: About 1.25 cm. Internode length: About 5cm. Texture: Glabrous; with thorns. Color: 146A. Thorns: Amount:Abundant. Height: About 7 mm. Diameter, at base: About 8 mm. Shape:Triangular. Color: 177B.

[0035]Foliage description.—Arrangement: Alternate; compound with five toseven leaflets. Quantity per flowering stem: About 13 compound leaves.Leaf length: About 16 cm. Leaf width: About 12 cm. Terminal leafletlength: About 8.5 cm. Terminal leaflet width: About 5.5 cm. Leafletshape: Ovate. Leaflet apex: Acute. Leaflet base: Obtuse. Leaflet margin:Serrate. Leaflet texture: Smooth, shiny. Leaflet venation pattern:Pinnate. Petiole length: To base of lower leaflet: About 3 cm. To baseof terminal leaflet: About 9 cm. Petiole diameter: About 2.5 mm.Stipules: Two at either side of petiole base; less than 1 cm in lengthand about 1 mm in diameter; linear in shape. Color: Young foliage, uppersurface: 200B. Young foliage, lower surface: 183A. Fully expandedfoliage, upper surface: 139A. Fully expanded foliage, lower surface:147B. Venation, upper surface: 139A. Venation, lower surface: 152A.Petiole and stipules: 137B.

[0036] Flower description:

[0037]Flower type and habit.—Large salmon orange-colored flowers.Consistently symmetrical rosette flowers. Freely and recurrent floweringhabit. Flowers arranged singly at terminal apices or in sprays of 2 to 4flowers and flower buds per spray. Flowers persistent.

[0038]Flowering season/time to flower.—Year-round under greenhouseconditions. Depending on environmental conditions and season, time toflower is about seven weeks.

[0039]Flower diameter.—About 12 cm.

[0040]Flower depth (height).—About 5.5 cm.

[0041]Flower longevity on plant.—About 17 days.

[0042]Flower longevity as a cut flower.—About 12 days.

[0043]Fragrance.—Not detected.

[0044]Flower buds (at stage of showing color).—Shape: Ovoid. Length:About 5 cm. Diameter: About 3.6 cm. Color: 42C.

[0045]Petals.—Quantity: About 35 per flower arranged in about 6 whorls.Length: About 6 cm. Width: About 7 cm. Shape: Orbicular. Apex:Mucronate. Margin: Entire, undulate, reflexed. Texture: Smooth, satiny.Color: When opening, upper surface: 48A. When opening, lower surface:50C. Fully opened, upper surface: 37A; color fading to 37C with paleyellow, close to 10D, towards the margins with subsequent development.Fully opened, lower surface: 37B.

[0046]Sepals.—Quantity per flower: Five. Calyx length: About 4.6 cm.Calyx diameter: About 4.3 cm. Shape: Elongated, linear. Apex: Aristate.Margin: Mostly entire with random linear extensions, usually less than1.5 cm in length. Texture: Smooth. Color, upper and lower surfaces:146B.

[0047]Peduncles.—Strength: Strong. Aspect: Erect. Length: About 14 cm.Color: 146A.

[0048]Reproductive organs.—Stamens: Quantity per flower: About 50.Anther length: About 4 mm. Anther shape: Ovate. Anther color: 15B.Pollen amount: Abundant. Pollen color: 10B. Pistils: Quantity perflower: About 60. Style length: About 8 mm. Style color: 157D. Stigmacolor: 11A. Ovary color: 155B.

[0049]Seed.—Length: About 7 mm. Diameter: About 4.9 mm. Shape: Oval.Color: 159A.

[0050] Disease/Pest resistance: Resistance to Powdery Mildew has beenobserved on plants grown under commercial greenhouse productionconditions. Plants of the new Hybrid Tea Rose have not been observed tobe resistant to pests common to roses.

It is claimed:
 1. A new and distinct Hybrid Tea Rose plant named‘Prerarust’, as illustrated and described.